Starting device for engines of motorcycles



A. GARELLI.

STARTING DEVICE FOR ENGINES 0F MOTORCYCLES. APPLICATION mm APR. 30, 1919.

1,366,581 Patented Jan. 25, 1921.

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Jove/avata I fldajfer w are]?! APPLICATION FILED APRHEO I919.

Patented Jan. 25, 1921.

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ADALBERTO GAEIELLI, F EIILAN, ITALY.

STARTING DEVICE- EFOR 0F MQTQRCYCLES.

Application filed A rn so,

T 0 all whom it may concern Be it known that 1,1; GARELLI, subyect of the Ring of l ding at Milan, ltaly, have invented certain new and useful Improvements in t3 ting Devices for Engines of -l-/lotorcycles, of which the following is a saecification.

This invention relates to starting devices for motor cycles and like vehicles and for its object kind in which evice of this the starting t Just is exerted on a member whi h operates the secondary or driven shaft of the change" speed gear, thus allowing re ducing the transmission ratio between 60-.

operating-starting members as well as size thereof and of inclosin the same within said change speed gear box.

The annexed drawing shows a construction of a change speed gear provided with the device according to this invention, Figure 1 being a transverse section through the center lines of the inain and secondary shafts or the speec change gear box; Fig. 2 is a section on line 50-50 Fig. 1.

As shown in sa d drawing the change speed gear comprises a casing made of two sections 2 in which are journaled the main sha ft 3 having fixed to it a pinion 4: for driving the vehicle wheels and a secondary shaft 5 having fixed to it pinions 6 and '4' the same being located near the ends of said shaft so as to leave afree space therebetween.

Loose on said shaft 3 are mounted a pinion 8 meshing with pinion 6 and a sleeve 9 having a pinion 10, located outside of said box to receive the engine drive, and a pinion 11 meshing with pinion 7.

Pinion 8 and sleeve 9 are provided with front teeth or projections 12 and either of them may be coupled to shaft 3 by means of a sleeve 13 having it opposite faces provided with teeth is and adapted to be shifted by any proper means not shown, said sleeve being coupled to rotate with shaft 3 by means of a key 15 or the like.

As will be obvious by engaging sleeve 13 with sleeve 9 the shaft 3 and inion 4 are connected therewith and with pinion 10 driven by the engine; on the contrary by engaging sleeve 13 with pinion 8 the drive is obtained by the intermediary of pinion 10, sleeve 9, pinions 117, shaft 5, pinions 6 and 8 and shaft 3, said shaft 3 being coupled to pinion 8 by the described cooperating engagement of teeth 14. and 12 of sleeve 13 and pinion 8,

Specification of Letters Patent.

L 1 on teeth 1.7 enga .on 'meinber 22 so as to cause it Patented Jan. 25, 1921.

1919. Serial NO. 293,773.

and thus a different transmission ratio between pinions 10 and 1 is obtained.

The construction and opei on of change eed gear are described merely for purpose c earness, and the some do not form a feeure of this invention which consists in th device hereinafter described anopointed out inappended claims.

The starting device comprises a pinion 16 loosely mounted on shaft 5 between pinions 6 and 7 and having ratchet or screw front i V corresponding ratchet or screw front teeth provided on said pinion T, a spring 18 located between pinions 6 and 16 acting to hold the pinion 16 with its teeth 17 in engagement with those of pinion 7.

In a bearing 21 integral with casing tion 2 is journaled a shaft having fixed to it a toothed quadrant 19 adapted to mesh. with pinion 16 and drive it, said shaft being provided with handle or pedal 22 for operating it, and the projecting end 2% of sprii P engages said member 22 so as to hold t in position by which quadrant 19 is out of mesh with pinion 16.

For starting the engine a thrust is exerted to rotate against action of spring and to carry its quadrant 19 into mesh with pinion 16 th rotation of said quadrant 19 being transni t toapinicn 7 owing to front teeth 17 which are inclined to engage pinions 16 and 7 in this direction and thus pinion 11, sleeve 9 and pinion 10 are operated, the last named part being connected with the engine shaft so as to drive it for producing its starting.

0n member 22 being released, spring 23 acts to carry it into its ordinary position, this being allowed by the ratchet engagement between pinions 7 and 16, the latter being free of rotating with regard to pinion 7 in the proper direction.

In the known constructions in which the starting member or quadrant operates the main shaft of change speed gear or the engine shaft itself, said quadrant must have a large diameter with regard to that of the cooperating member mounted on either of said shafts in order to rotate the engine shaft through a few revolutions by the displacement of said quadrantwhich ordinarily has an extension of about 180; on the contrary with the construction according to this in vention the ratio between quadrant l9 and pinion 16 may be very much reduced as the 7 and 11 and of pinion l and the cooperating one on the engine shaft as these gears ordinarlly operate to reduce the number of revolutions in the transmission of power from engine to wheel.

A further advantage secured by this construction is that said quadrant 19 and cooperating pinion 16, owing to the reduced size of the same, may be inclosed within the box of the change speed gear, this arrangement protecting them and insuring their lubrication; the thickness of said box does not have to be increased for this purpose as the space intermediate pinions 6 and 7 is utilized, this space being required for mounting and shifting sleeve 13 between pinions 8 and 11 cooperating with said pinions 6 and 7 respectively.

Obviously the construction of various parts may be modified accordlng to circumstances and a loose pinion may be inserted between quadrant 19 and pinion 16 to reverse the rotation of this latter if required.

What I claim as my invention and desire to secure by United States Letters Patent is 1. An engine'starting device for motorcycles, comprising in combination a main shaft embodying driving and driven portions in alinement with each other; a second ary shaft parallel with said main shaft a starting shaft parallel with said main shaft: cooperating pinions on the driving and driven portions of said main shaft and on said secondary shaft forming a change-speed gear transmission; a gear having a one-way clutch connection with said secondary shaft; a toothed quadrant fixed to said starting shaft and movable into and out of mesh with said gear; and means for actuating said toothed quadrant.

2. An engine starting device for motorcycles, comprising in combination armain shaft embodying driving and driven portions in alinement with each other; a secondary shaft parallel with said main shaft; a starting shaft parallel with said secondary shaft; cooperating pinions on the driving and driven portions of said main shaft and on said secondary shaft forming achangespeed gear transmission; a gearhaving a one-way clutch'connection with said secondary shaft and mounted on the same between two of the transmission pinions thereon; a toothed quadrant fixed to said starting shaft and movable into and out of mesh with said gear; and means for actuating said toothed quadrant. Y

3. An engine starting device for motorcycles, comprising in combination a main shaft embodying driving and driven portions in alinement with each other; a secondary shaft parallel with said main shaft; a starting shaft parallel with said secondary shaft; cooperating pinions on the driving and driven portions of said main, shaft and on said secondary shaft forming a changespeed gear transmission; a gear loose on the secondary shaft between two of the pinions thereon, said loose gear being provided with clutch teeth for engagement with clutch teeth on the adjacent face of one of said pinions; a spring pushing. said loose gear against the pinion provided with clutch teeth; a toothed quadrant fixed to said starting shaft and'movable into and out of mesh with said gear; and means for actuating said toothed quadrant.

In testimony whereof I affix my signature.

ADALBERTO GARELLI. 

